| Rajanix Oy | Arts & recreation | 2007 |
| Rakenne Sami Oy | Construction | 1994 |
| Rakennus A. Malm Oy | Real estate | 1984 |
| Rakennus Ruismäki Oy | Construction | 2020 |
| Rakennusliike HTM Oy | Construction | 2011 |
| Rakennusliike J. Malm Oy | Construction | 1988 |
| Rakennusliike N. Kajan Oy | Construction | 2026 |
| Rakennusliike Tikirak Oy | Construction | 2008 |
| Rakennusliike Timpuriduo Oy | Construction | 2012 |
| Rakennuspalvelu A.Vuopio Oy | Construction | 2023 |
| Rakennuspalvelu DESP Oy | Construction | 2024 |
| Rakennuspalvelu J. Vesanen Oy | Professional & scientific | 2006 |
| Rakennuspalvelu Koivumäki Oy | Construction | 2021 |
| Rakennuspalvelu M. Paananen Oy | Construction | 2022 |
| Rakennustoimisto Knuutila Oy | Construction | 2020 |
| Rakennustyö Honkanen Oy | Construction | 2014 |
| Rakennuttajapalvelu Saraste Oy | Construction | 1996 |
| Rakentamisen Mestarit Oy | Construction | 2024 |
| Rakside oy | Construction | 2025 |
| Ralukon Oy | Information & communication | 2016 |
| Ramicon Oy | Professional & scientific | 1983 |
| RannikkoGroup Oy | Other services | 2015 |
| Rasti Holding Oy | Financial services | 2024 |
| Rastisoft avoin yhtiö | Information & communication | 2018 |
| Raudoitus P. Rintala Oy | Construction | 2020 |
| Rautajärven Konehuolto Oy | Other services | 2011 |
| Rautajärven Varaosa Oy | Wholesale & retail | 2021 |
| Ravintola Maijuska Ky | Hospitality | 1989 |
| Ravintola Paakari Oy | Hospitality | 2016 |
| Reaktiivi Ky | Wholesale & retail | 1991 |
| Renovo Oy | Professional & scientific | 2020 |
| Reon Oy | Water & waste | 2019 |
| Resilience Consulting Oy | Professional & scientific | 2024 |
| Reveneur Oy | Real estate | 2017 |
| Revisio&Konsult Silva&Agro OY | Professional & scientific | 1995 |
| Rijon Partners Oy | Health & social care | 2023 |
| Riku Suokas Entertainment Group Oy | Arts & recreation | 2013 |
| Rimavest Oy | Financial services | 2024 |
| Risinvest Oy | Professional & scientific | 1986 |
| Rivenez Oy | Professional & scientific | 2023 |
| Rivermeadow Oy | Professional & scientific | 2023 |
| Robusto Oy | Professional & scientific | 2015 |
| Rock Band & Service NMT Ky | Professional & scientific | 2004 |
| Roineen Ratsutila Oy | Real estate | 2012 |
| Rolemet Oy | Manufacturing | 2026 |
| Romeo Autokorjaamo Oy | Other services | 2024 |
| Romuliike Järvinen Kommandiittiyhtiö | Wholesale & retail | 1982 |
| Rootstone Oy | Professional & scientific | 2009 |
| RopSak Oy | Construction | 2017 |
| Rosettestone Oy | Arts & recreation | 2021 |
| Rovasti Holding Oy | Professional & scientific | 2024 |
| Rukan Myssy & Pipo Oy | Hospitality | 2023 |
| Ruoholahden Tebman Oy | Hospitality | 2010 |
| Ruudukko Oy | Construction | 2023 |
| Räpinä Oy | Real estate | 1993 |
| S&T Rakentajat Oy | Construction | 2020 |
| S-Company Oy | Professional & scientific | 2019 |
| SALADIN TECHNOLOGIES Oy | Information & communication | 2026 |
| SBL Invest Oy | Real estate | 2013 |
| SBU Holding Oy | Financial services | 2024 |
| SH Autotalo OY | Wholesale & retail | 2016 |
| SH Partners Oy | Construction | 2013 |
| SJL Partners Oy | Real estate | 2020 |
| SL-Putki Oy | Construction | 2014 |
| SL-Sijoitusyhtiö Oy | Financial services | 2023 |
| SML Medical Oy | Health & social care | 2016 |
| SMP Arboristit Oy | Agriculture & fishing | 2013 |
| SOM Hand Design Oy | Real estate | 2013 |
| SOMA Housing Oy | Real estate | 2021 |
| SPR Partners Oy | Construction | 2022 |
| STH-Trading Oy | Wholesale & retail | 1997 |
| Suomen Leimabetoni OY | Construction | 2015 |
| SaPesalit Kangasala Oy | Arts & recreation | 2011 |
| SaRock Oy | Construction | 2025 |
| Saarikylien Jaakkola Oy | Real estate | 2018 |
| Saavutin Oy | Professional & scientific | 2019 |
| Safepiggy Oy | Administrative & support | 2012 |
| Sahalahden Koneistus Oy | Manufacturing | 1990 |
| SaijaH Oy | Administrative & support | 2020 |
| Sajova Oy | Financial services | 2020 |
| Sakai24 Autot Oy | Wholesale & retail | 2024 |
| Sakate Oy | Construction | 2012 |
| SalWin Oy | Administrative & support | 2018 |
| Salcce Oy | Information & communication | 2009 |
| Salohaavisto Oy | Water & waste | 2015 |
| Salsu Invest Oy | Financial services | 2020 |
| Sami Kortelahti Ky | Transport & logistics | 2012 |
| Sammon Metalli Oy | Manufacturing | 1990 |
| Samron Oy | Wholesale & retail | 2003 |
| Saneeraus A. Luukkonen Oy | Construction | 2007 |
| Saneerauspalvelu Leppäsalko Oy | Construction | 2010 |
| Sanelma Puheterapiapalvelut Oy | Health & social care | 2026 |
| Sappee Consulting Oy | Information & communication | 2021 |
| Sarsa-Yhtymä Oy | Professional & scientific | 2004 |
| Saukko Invest Oy | Financial services | 2022 |
| SaunaSammakko Oy | Hospitality | 2024 |
| Saunatemppeli Oy | Other services | 2020 |
| ScanPlastic Oy | Manufacturing | 2022 |
| Scandic Pharma Oy | Wholesale & retail | 2023 |
| Seedor Oy | Wholesale & retail | 2020 |